Herein, data on rainbow trout infections with the copepod Caligus lacustris in cage aquaculture Lake Ladoga is presented. (n = 127 ex.) were collected from a farm housing cage-reared to describe size–age and sex structure of population. Morphological features copepods evaluated according 10 characters terminology proposed by Kabata Gusev (J Linn Soc (Zool) 46(309):155–207, 1966). To determine p...

The first Chilean species of Bogidiellid amphipod, Patagongidiella wefkoi n. sp., is described from freshwater springs in the Osorno Province, Los Lagos Region. The new taxon is characterized principally by the structure of the hypertrophied facial robust seta present on the peduncle of male uropod 1, and the modified dimorphic setae on the exopod of male pleopod 2. The new species is described...

This study examines the phylogenetic relations among freshwater species of brown algae using RUBISCO large subunit (rbcL) sequences, in conjunction with diagnostic morphological and developmental traits. We focused on the phylogenetic and taxonomic placement of five freshwater species, Bodanella lauterborni, Ectocarpus siliculosus, Heribaudiella fluviatilis, Pleurocladia lacustris, and Porterin...

Abstract This study aimed to identify species of Astyanax bimaculatus group from four Itaipu Reservoir tributaries (Paraná River Basin) by cytogenetics and molecular markers (COI) investigate the possible occurrence cryptic diversity in part this basin. The populations showed only one karyotype formula simple AgNORs. FISH with 18S rDNA probe a high variation, 5S probes evidenced sites most spec...

We evaluated dormancy loss in seeds of 14 Carex species (C. atherodes, C. brevior, C. comosa, C. cristatella, C. cryptolepis, C. granularis, C. hystericina, C. lacustris, C. pellita, C. scoparia, C. stipata, C. stricta, C. utriculata, C. vulpinoidea) under growing season and stratification conditions and determined the temperature requirements for germination. Seeds were germinated for 1 year a...

The European lobster, Hommarus gammarus, is a commercially important species in Europe. Despite successful stock enhancement programs during the last two decades, culture methods of H. gammarus are still progress. In this study, effects pseudo-green water technique and clear with lower stocking densities on growth survival larvae stages I-IV were investigated. All reared 800 L cylindro-conical ...

The successful establishment of European lobster (Homarus gammarus) land-based production is hampered by the high mortality rate during larval development, which can be partially explained proliferation pathogens in communal tanks commonly used for rearing. Therefore, disinfection water treatment could improve low survival rates frequently recorded H. gammarus farming. In this study, we evaluat...